Universal toolholder



Oct. 19, 1943. A KOUSCHML 2,332,449

UNIVERSAL TOOL HOLDER Filed April I21. 1942 irl D l ATTORNEY Patented Cet. 19, 1943 UNITED S*FA'PES f n 2,332,449 Y y.uNLvrinsAL .TL'IIIOIflJ-IER.y Afanasi Kouschpil, New York, N. Y. v

, VApplication April 21, 1942,; Serial No. 439,863 sclaims. (c1. 294.96).

This invention relates to new anduseful improvements in auniversaltool holder. Y' 1 lMore specically,' the Ainvention proposes the construction of a universal too] holder characterized by a shank having a pivotally mounted tool head normally in end alignment with said shank and movable to extendV eitherto the right or the left of the shank in a manner to permit the. single tool holder to be used as a straight, left-hand or right-hand tool holder.

' Heretoforait has been customary to provide each lathe operato1l with a straight tool holder, a left-hand `tool holder and a right-hand tool holder to meet the requirements of the jobs being done .by the operator. This invention proposes replacing these three tools with a single tool constructed to be adjustable to meet the requirements of either of the three tools previously used, resulting in a saving of metal and reducing the number of tools the operator must handle.l

Another .object of this invention proposes .forming the shank with abifurcated front end with d the branches thereof slightly flexibeand having the reduced end portion formed on the tool head disposed therebetween with a screw engaged through the overlapping portions ofsaidbranches,

and said reduced end portion for pivotally supporting the tool headv and for drawing the branches together to frictionally grip the top and bottom faces of the reduced end portion and securely lock the tool headinvarious adjusted pivoted positions With relation to the' shank.

It is a further object of this invention to form the front end ofthe toolhead withy a socket opening into which theblunt end of a cutting tool is adapted -'to be engaged and to provide the tool head with a means for securely locking the cutting tool in position Within the socket opening in amanner to facilitate'the engagement of the cutting ltool against the work being shaped upon the lathe.

'Another object of this vfvention proposes the construction of a universal,tool'holder'which is simple and durable and' whichv may be Vmanufactured and sold ata reasonablecost.

For further comprehension of this invention, and of the objects and advantages thereof, refrence will `loe had to the following description and accompanying drawing, .and to the append,-

ed claims. in which the various novel features of the invention are more particularly set forth.

` inthe accompanyinadrawina forming. amaterial part of this disclosure; y, Y Y Fig. lis a side elevational View of a universal tooll holder constructed* in accordance` with this invention; A l Fig. 2 is atop plan viewof Fig. 1. Y Fig. 3 is airagmentary. vertical sectional vie taken on the line 3-3 ofFig. 2.

Fig. 4 is a perspective. view ofthe cuttingrtcol, per se.

Fig. v5..is.ay perspective. view4 ofv a cutting tool,

per se, in accordance with a modification of this invention. I I

-Fig..6 is a view similar Fig. 1 but illustrating, amodication of theinvention..

Fig. 7 isa plan viewofFig. 6.

Fig. .8.is a side elevational view oi a tool holder l constructed in .accordance with anotherfmodiiiy Fig. 91's aplan view. of Fig. 8.. -f I Theuniversal tool holder; according to this invention, includes ashankIDwhich is adapted to be -mounted upon a lathe or. other .similar machine. Theshank I0 is substantially rectangular in cross section and has its greatest dimension in the verticalto takey maximum stress in the vertical. ;,The front end` of ther shank I0 is bifurcated:` and has its .branches I Lsuperimposed one upon the otherandvery. slightly iiexible. A tool head I2.r is disposed upon the rfront end of the shank I0. This toolhe'ad I2 is formed with a reduced rear end portion I3 which engages between: the adjacent-face5 Vof the branches Il ofthe shank. y

The.front end of the tool head I2 is formed with an inwardlyv extending Asocket opening I4.

` The blunt end'oi a cutting tool.A I5, is adapted to be extended intothe socket openings i4. A clamp screw I6 lis;threacledly'mounted through the side ofthe tool. headV I2v and Vis engageable,l against the cutting tool I5f`to securely .hold the cutting toolV I5 in position within .the socket opening.

Y Meanslis vprovided for holding the toollhead l2 y in an aligned. position withthe shank Iii as illustrated by fthe full lines in Fig. 2 or in a righthandV or, aletfhand pivoted position relative to the shank Ill. as illustrated by the dot and dash lines I2.; in Fig.,2. lThisis accomplished by ya socket head'screw Il. Thescrew l1 has lan enlarged ,headl I8, .which extendsv partially into an lappingv portions, ofl `the,...renrlainderY of ther top branch I l, 'the reduced, endy portion ,ligand the bottom bra-nenn.

.Openingsareinnd alignment Wiihlach,

other and extend concentrically downwards from the bottom end of the opening I9 into which the head I8 of the screw I'I extends. The shank 20 of the screw I1 is formed with threads which engage complementary threads formed in the opening 2I formed in the bottom branch II of the shank I0.

The operation of this form of the invention is as follows:

To mount a cutting tool I5 in the socket opening I4, the clamp screw is turned to a position in the interior of the socket opening is unobstructed. The blunt end of the cutting tool I5 is then extended into the socket opening I4 and the screw I6 is turned inwards to engage the" cutting tool and rigidly clamp the cutting tool in position.

The shank I0 of the holder is then mounted` in position upon the lathe or other machine. To adjust the angular position of the tool head I2 with relation tov the shank` I0; the socket screw I'I is turned outwards. The head' I8 of the screw I'I is formed with al socket openingv into which a turning tool is adapted to be engaged for facilitating the turning of the screw I'IL This outward movement ofthe: screw I-1 frees the tool head I2 to be pivoted into any desired position relative tothe shank I0 about thefscrew ITI.. When the desiredadjusted position of the tool head is reached, the screw II is turned inwards causing the inner faces of;v the branches II to frictionally engage. and grip? the reduced end portion I3. When the. screwL I'1 isV turned, theV engagementA ofV theihea'd' I0 againstthe base of the opening I9- and the threaded engagement of the shank with theopening 2|* in the bottom branch II causes the branchestobe flexed slightly towards eachA other to clamp. and` frictionally grip the end portion I3.

In Fig. 'acutting tool It'nf` of diierent-shape is illustrated. The cutting too'l I5 has a thick'- ness less tha-nthe width of the socket' opening I4 formed in the front end ofthe;toolhea'd I2. A shim 22 isadapted tobe" mounted upon: the cutting tool I5 touincreasetliethickness ofthe cutting tool I5? to correspond withthe` width of the socket openingV I4` and cause they cutting tool I5 to seat solidly withinl the socketi openlng.

In Figs. 6 and 7 ,a modied form of universal tool holder is illustrated in which means is pro'- vided for assisting the screw I'I in l.locking the tool head I2 in various" adjusted pivotedf posi'- tions relative to theshank I0. This means comprises a set screwY 23 which threadedly enga-ged L through the bottom branch II of the shank' I0;

and which has-.its upper'e'ndengaging'thefbot-- tom face of the end' portion I3?l ofthe tool head I2. The end portion I3 is fan shaped so asto be engaged by. the set screw 23Y in'. all ofzthe-adjusted positions offthe to'olwhead` I2irela-tive to the shank` I0. The engagement of the set screw 23 against thereduced` end portion: I3' ini addition` to assisting` in' holding! thet tool head I2 xedly in-position` against pivoting, also acts to,

edly in position is illustrated. In this form of the invention the tool head I2 is formed with a fan shaped reduced end portion I3 having converging inclined rear walls. Openings 24 are formed in the shank IU and extend at right angles from the converging rear walls of the reduced end portion I 3e. Socket set screws 2 are threadedly engaged into the openings 24 an bear against the converging rear walls of th reducedV end portion I3. The set screws 25 assist the screw I1 in locking the tool head I2 fixedly in position and also serve to hold the tool head against vertical vibration relative to the shank I0.

In other respects this form of the invention is similar to the rst form, and like reference numerals are used to identify like parts in each of the several views.

While I have illustrated and described the preferred embodiments `of my invention, it is to be understood that I do not limit myself to the precise constructions hereinl disclosed and the right is; reserved tofall changes and modifications coming withinthe scope of the invention as denedin the appended claims.

Having thus described my invention, what I claim asnew andidesire to secure by United States Letters Patent is: Y l l 1'. A universal tool holder having a shank formed with a bifurcated end forming spaced branches and a toolheadV having a reduced end disposed between said branches with a screw engagedl through saidy overlapped branches and reduced end-for clamping:saidtool head in variouspivotedpositions relative toA said shank, said reduced end onsaid tool head being fan shaped andhaving converged inclined rear end walls, and rneansengageable-against said inclined rear end walls for assisting said screw in; clamping said tool head in= position..

2.- A` universal tool holder having a shank formed with a bifurcated end forming spaced branchesand` a tool headv havinga reduced end disposed between saidbranches with a screw engaged through saidoverlapped branches and reduced end-for clamping said tool'head in various pivoted positions relative togsaidshank, said reducedlendon said toolv head beingy fan shaped and having converged inclined rear end walls, andlmeanslengageable againstfsaid inclined rear endl walls for assisting said screw in clamping said t'ool head iii-position, comprising set screws threadedly engagedinto openings formed in said shank and'bearing against' saidincl'ined'rear end walls.

A universal' tool. holder having ay shank formedf with a hifurcated end forming spaced branches and a tool' head having a reduced end disposed between said'b'ranches with a screw en` ga'gedthrouglisaid overlapped branches and reduced'en'd4 for clamping said tool head in various pivoted positions relative to said shank', said reduced en'd on said tool headr being fan shaped and" having converged inclinedrear end walls', and; means engageable against said inclined rear end walls.v for'assisting said' screw in clamping said tool head in' position, comprising set screws threadedl'y engaged into openirigsformed4 in said' shank and bearing against said inclined rear end walls, said openings in' saidshank beingv formed at right; angles to said inclined rear en'd'walls' so tliatv saldset screws will have theirf inner ends seated solidly against said `inclined rear end w'all's;

AFANA'SI* KOUSCHPIL. 

